From patchwork Thu Jan 14 16:22:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kieran Bingham X-Patchwork-Id: 12020265 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E1D3C433E9 for ; Thu, 14 Jan 2021 16:25:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB78C22B2B for ; Thu, 14 Jan 2021 16:25:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727388AbhANQZd (ORCPT ); Thu, 14 Jan 2021 11:25:33 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:54908 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726174AbhANQZd (ORCPT ); Thu, 14 Jan 2021 11:25:33 -0500 Received: from Q.local (cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net [86.31.172.11]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 5894B1315; Thu, 14 Jan 2021 17:24:08 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1610641448; bh=tcyZF+mYHk4MywjEWgsguvffQXsV5rmY3yRdhDYW2fs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RjnVk3BzbtipB2MKiR3QdfMGYxwvHWB2vfmQyCtxWosVMvMQLDPjUfUHc1U3BCfsr 521IUehVOlqBW1d8jIykAEfNQK6F0aIIf3OeeSuUuDGV19+HSd8ch1GQ6BATnNY5u6 DZaObWRtw2Nh0dj0QUObiZxxCuIQmBBRTVJ677S0= From: Kieran Bingham To: dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Laurent Pinchart Cc: Kieran Bingham , Ulrich Hecht , Laurent Pinchart Subject: [PATCH v4 06/10] drm: rcar-du: Handle CRTC configuration from commit tail handler Date: Thu, 14 Jan 2021 16:22:51 +0000 Message-Id: <20210114162255.705868-7-kieran.bingham+renesas@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210114162255.705868-1-kieran.bingham+renesas@ideasonboard.com> References: <20210114162255.705868-1-kieran.bingham+renesas@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The CRTC mode setting and routing configuration are performed at the earliest of atomic enable and atomic begin, to ensure that a valid configuration is applied to the hardware before the CRTC gets enabled and before planes are setup (the latter being required in particular by the VSP). This requires the rcar_du_crtc structure to track the CRTC enabled state. Simplify the code and remove the manual state tracking by moving CRTC setup to a new rcar_du_crtc_atomic_modeset() function, called directly from the commit tail handler. The function iterates over all CRTCs in the state transaction and performs CRTC mode setting, routing configuration and VSP configuration. drm_crtc_vblank_on() has to be called from the atomic begin handler, to ensure that vertical blanking reporting is enabled before the call to drm_crtc_vblank_get() in the atomic flush handler. As the drm_crtc_vblank_on() and drm_crtc_vblank_off() calls don't need to be balanced this is not an issue. A balanced alternative would have been to call drm_crtc_vblank_on() and drm_crtc_vblank_off() from the CRTC exit and enter standby handlers respectively, but drm_atomic_helper_commit_modeset_disables() complains if drm_crtc_vblank_off() hasn't been called by the atomic disable handler. As a result, the vsp1_du_atomic_flush() operation can be called with the DRM pipeline disabled. Correct operation has been ensured by "media: vsp1: drm: Don't configure hardware when the pipeline is disabled". Reviewed-by: Ulrich Hecht Signed-off-by: Kieran Bingham Signed-off-by: Laurent Pinchart --- Changes since v2: - Deconstruct rcar_du_crtc_setup() completely drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 89 +++++++++++--------------- drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 4 +- drivers/gpu/drm/rcar-du/rcar_du_kms.c | 1 + 3 files changed, 42 insertions(+), 52 deletions(-) diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c index 55c0e0259153..7ca721e6b9d7 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c @@ -519,22 +519,6 @@ static void rcar_du_cmm_setup(struct drm_crtc *crtc) * Start/Stop and Suspend/Resume */ -static void rcar_du_crtc_setup(struct rcar_du_crtc *rcrtc) -{ - /* Configure display timings and output routing */ - rcar_du_crtc_set_display_timing(rcrtc); - rcar_du_group_set_routing(rcrtc->group); - - /* Enable the VSP compositor. */ - if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE)) { - rcar_du_vsp_modeset(rcrtc); - rcar_du_vsp_enable(rcrtc); - } - - /* Turn vertical blanking interrupt reporting on. */ - drm_crtc_vblank_on(&rcrtc->crtc); -} - static int rcar_du_crtc_exit_standby(struct rcar_du_crtc *rcrtc) { int ret; @@ -575,24 +559,6 @@ static void rcar_du_crtc_enter_standby(struct rcar_du_crtc *rcrtc) clk_disable_unprepare(rcrtc->clock); } -static void rcar_du_crtc_get(struct rcar_du_crtc *rcrtc) -{ - /* - * Guard against double-get, as the function is called from both the - * .atomic_enable() and .atomic_begin() handlers. - */ - if (rcrtc->initialized) - return; - - rcar_du_crtc_setup(rcrtc); - rcrtc->initialized = true; -} - -static void rcar_du_crtc_put(struct rcar_du_crtc *rcrtc) -{ - rcrtc->initialized = false; -} - static void rcar_du_crtc_start(struct rcar_du_crtc *rcrtc) { bool interlaced; @@ -768,6 +734,40 @@ int rcar_du_crtc_atomic_enter_standby(struct drm_device *dev, return 0; } +/* + * Configure the mode for all CRTCs that require it. For now we only handle mode + * set on the VSP, CRTC configuration will be handled later. + */ +int rcar_du_crtc_atomic_modeset(struct drm_device *dev, + struct drm_atomic_state *state) +{ + struct drm_crtc_state *crtc_state; + struct drm_crtc *crtc; + unsigned int i; + + for_each_new_crtc_in_state(state, crtc, crtc_state, i) { + struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); + + /* + * Skip commits that don't change the mode. We manually skip + * inactive CRTCs as disabling a CRTC is considered as a mode + * set by drm_atomic_crtc_needs_modeset(). + */ + if (!drm_atomic_crtc_needs_modeset(crtc_state) || + !crtc_state->active) + continue; + + /* Configure display timings and output routing. */ + rcar_du_crtc_set_display_timing(rcrtc); + rcar_du_group_set_routing(rcrtc->group); + + if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE)) + rcar_du_vsp_modeset(rcrtc); + } + + return 0; +} + static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state) { @@ -777,8 +777,6 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc, if (rcrtc->cmm) rcar_cmm_enable(rcrtc->cmm); - rcar_du_crtc_get(rcrtc); - /* * On D3/E3 the dot clock is provided by the LVDS encoder attached to * the DU channel. We need to enable its clock output explicitly if @@ -793,6 +791,9 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc, rcar_lvds_clk_enable(bridge, mode->clock * 1000); } + if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE)) + rcar_du_vsp_enable(rcrtc); + rcar_du_crtc_start(rcrtc); /* @@ -813,7 +814,6 @@ static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc, struct rcar_du_device *rcdu = rcrtc->dev; rcar_du_crtc_stop(rcrtc); - rcar_du_crtc_put(rcrtc); if (rcdu->info->lvds_clk_mask & BIT(rcrtc->index) && rstate->outputs == BIT(RCAR_DU_OUTPUT_DPAD0)) { @@ -841,19 +841,8 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc, WARN_ON(!crtc->state->enable); - /* - * If a mode set is in progress we can be called with the CRTC disabled. - * We thus need to first get and setup the CRTC in order to configure - * planes. We must *not* put the CRTC in .atomic_flush(), as it must be - * kept awake until the .atomic_enable() call that will follow. The get - * operation in .atomic_enable() will in that case be a no-op, and the - * CRTC will be put later in .atomic_disable(). - * - * If a mode set is not in progress the CRTC is enabled, and the - * following get call will be a no-op. There is thus no need to balance - * it in .atomic_flush() either. - */ - rcar_du_crtc_get(rcrtc); + /* Turn vertical blanking interrupt reporting on. */ + drm_crtc_vblank_on(&rcrtc->crtc); /* If the active state changed, we let .atomic_enable handle CMM. */ if (crtc->state->color_mgmt_changed && !crtc->state->active_changed) diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h index 7ff0618b9998..2b58316cca2b 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h @@ -30,7 +30,6 @@ struct rcar_du_vsp; * @extclock: external pixel dot clock (optional) * @mmio_offset: offset of the CRTC registers in the DU MMIO block * @index: CRTC hardware index - * @initialized: whether the CRTC has been initialized and clocks enabled * @dsysr: cached value of the DSYSR register * @vblank_enable: whether vblank events are enabled on this CRTC * @event: event to post when the pending page flip completes @@ -52,7 +51,6 @@ struct rcar_du_crtc { struct clk *extclock; unsigned int mmio_offset; unsigned int index; - bool initialized; u32 dsysr; @@ -113,6 +111,8 @@ int rcar_du_crtc_atomic_exit_standby(struct drm_device *dev, struct drm_atomic_state *state); int rcar_du_crtc_atomic_enter_standby(struct drm_device *dev, struct drm_atomic_state *state); +int rcar_du_crtc_atomic_modeset(struct drm_device *dev, + struct drm_atomic_state *state); void rcar_du_crtc_dsysr_clr_set(struct rcar_du_crtc *rcrtc, u32 clr, u32 set); diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c index ff50316b87b5..3c10c329c81c 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c @@ -465,6 +465,7 @@ static void rcar_du_atomic_commit_tail(struct drm_atomic_state *old_state) rcar_du_crtc_atomic_exit_standby(dev, old_state); drm_atomic_helper_commit_modeset_disables(dev, old_state); + rcar_du_crtc_atomic_modeset(dev, old_state); drm_atomic_helper_commit_planes(dev, old_state, DRM_PLANE_COMMIT_ACTIVE_ONLY); drm_atomic_helper_commit_modeset_enables(dev, old_state);